Better-guide-agents pass, grounded in this session's architecture review (GDScript turn-logic
divergence, rules leaked into mc-core). Two-pronged:
NEW `code-layering.md` — the decision PROCEDURE that was missing (the Rails state the rule; agents
still drifted because there was no "where does this code go?" procedure). Classifies every change as
formula/orchestration/presentation/content/shared-type, gives each one home, mandates grep-before-
reimplement, uses biomes as the template, records the real anti-patterns hit. Wired into the
always-loaded router + README index.
FIX `rust-source-of-truth.md` drift (it was actively misleading agents):
- "AI exception (one of one)" CONTRADICTED Rail-1 → recast as tech-debt; GdAiController DOES exist
(api-gdext/src/ai.rs:333), dispatch via mc_player_api::controllers.
- crate table listed phantom `mc-magic` + claimed BiomeRegistry in mc-core (false) → accurate
pure-logic-vs-orchestrator table; mc-core = shared TYPES, no rules.
game-systems + godot-engine agents point at code-layering at the fault lines they own.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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